19993280

素因数分解:

$2^6\times 5^1\times {\mathrm{43}}^1\times {\mathrm{1453}}^1$

素因数の和:1513

約数の個数: 56

約数和(自身を含む): 48749712

約数和(自身を除く): 28756432

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 43, 64, 80, 86, 160, 172, 215, 320, 344, 430, 688, 860, 1376, 1453, 1720, 2752, 2906, 3440, 5812, 6880, 7265, 11624, 13760, 14530, 23248, 29060, 46496, 58120, 62479, 92992, 116240, 124958, 232480, 249916, 312395, 464960, 499832, 624790, 999664, 1249580, 1999328, 2499160, 3998656, 4998320, 9996640, 19993280]

約数ペア:

[(1, 19993280), (2, 9996640), (4, 4998320), (5, 3998656), (8, 2499160), (10, 1999328), (16, 1249580), (20, 999664), (32, 624790), (40, 499832), (43, 464960), (64, 312395), (80, 249916), (86, 232480), (160, 124958), (172, 116240), (215, 92992), (320, 62479), (344, 58120), (430, 46496), (688, 29060), (860, 23248), (1376, 14530), (1453, 13760), (1720, 11624), (2752, 7265), (2906, 6880), (3440, 5812)]